Preheat the oven to 325oF. In a small heavy saucepan mix together the syrup, mustard, and sugar and heat slowly on low heat, stirring often. Cook until syrup thickens, about 10 minutes. Set aside. Fry bacon in a large pan on medium-high heat using a “bacon weight” to keep the bacon really flat as it cooks. When the bacon is cooked to your liking, drain the bacon on a paper towel. Lay the flattened bacon on a jelly roll pan and brush the glaze on both sides. Bake for 10 to 12 minutes.